Valve-grinder cup



C. D. ROSECRANS.

VALVE GRINDER CUP.l

APPLICATION FILED APR.5,1919.

Patented Mar. 23, 1920.

H m u w M M WMM M 0. QM.

CHARLES D. ROSECRANS, (JF HONOLULU, TERRITORY OF HAWAII. i

VALVE-@BINDER CUP.

Application filed April 5, 13121.

To all flo/wur t may Concern.'

Be it lrnown that I, CHARLES D. RosncRANs, aeitizen of the United States, and a resident of Honolulu, county of Honolulu, and rlderritory cit Hawaii, have invented a new and Improved Valve-Grinder Cup, of which the following a full, clear, and enact description.

My invention relates to valve grinder cups; that is, to devices used for holding the valves of internal combustion engines in order to grind the saine, the holding device having to some extent the function of a vacuum cup.

More particularly stated, my invention comprehends means for rendering the valve cup more particularly air tight and for fa* cilitating the removal and replacement of the cup; my invention further contemplates a, number of improvements in the mechanism contained within the cup and used for the purpose of adapting the vacuum cup to. valves of different types.

My invention further contemplates a number of changes in the details of construction of the mechanism of the cup for the purpose of improving the general etliciency thereof.

Reference is made to the accompanying drawings forming a part of the specification in which like reference characters indicate like parts throughoutfthe several iigures.

Figure 1 is a substantially central vertical section through my improved valve grinder cup.

Fig. 2 is an inverted plan or bottom view of the same.

Fig. 3 is a section on the line 3 3 of Fig. 1, looking in the direction ofthe arrows.

Fig. 41 is a fragmentary section on the line 1-4 of F ig. 1, looking in the direction of the arrows, but showing certain movable parts as occupying positions different from those that they occupy in said Fig'. 1.

A. revoluble stem is shown at t and forms a part of the usual valve grinding mechanism. ThisI stem supports a gimbal 6, which carries a plug G having a threaded portion 6b. A. sleeve is shown at and is `provided with a portion 5tL threaded internally to lit the threaded portion 6" of the plug and also threaded externally. A. cap 60 is threaded internally to lit the adjacent portion of the sleeve a 'flange 7 having a general annular form and integral with it. A hollow member' 8 having generally the form of a cup and Speclcaton of Letters Patent.

This sleeve carries at its low end' Patented Mar. 23, 1920.

Serial No. 237,666.

made of rubber is provided at its lower edge with a bearing surface SiL having a substantially annular form and adapted for engagement with the valve to be ground. The rubber cup is provided with a cylindrical' passage 9 and with an annular shoulder 10, the flange 7 abutting normally against this annular shoulder. The space within the cup is shown at 11. The sleeve 5 is provided with a shoulder 12. Located within the sleeve 5 is a coiled spring 13, always underl tension. The upper end of this spring engages the lower end of the plug Ga. Below the spring is a plunger 111, which extends down into the space 11 and carries a` pair of spline keys 15 of a form which may be understood more particularly from Fig. 3, the sleeve 5 beingI formed accordingly, so that the plunger 111 turns with the sleeve 5 when the latter is rotated. `Located upon the upper end of the plunger 1ct. is a disk 1G, secured in position by threaded bolt 17, as may be understood from Fig. 1. The lower end of the plunger lflis provided with a head member 1l, and carries a cross bar 18, this cross bar being provided with downwardly turned end portions 19. The cross bar is provided with slots 20, and extending through theseslots are bolts 21, These bolts support two nuts 22 and 23. Extending through these nuts are screws 24 and 25, having ljournal neclrs 2G and 27, which extend through the adjacent end portions 19` of the cross bar 18. The milled head 2l is secured rigidly to the screws 2l and 25, and is used for turning the same. The screw 211 has a right-handed pit-ch and the screw 25 has a left-handed pitch. The result is that when the milled head 241C" is turned in one direction the two nuts 23 and 22 are driven farther apart, whereas if the milled head 2a be turned in the opposite direction the two nuts are drawn toward each other. A driving bit 28 is provided with a pair of annular bearings 28 which encircle the screws 2d, which are provided4 with ournaled neclrs 25, for fitting the annular hearings 283. Thus the driving bit` 28 is journaled to swing or rock. The driving bit 28 has the form of a screw-driver, and has two normally lined positions indicated respectively in Fig. 1, and Fig. f1, as hereinafter described. A pair of anchor rods 29 and '30 are carried by the two nuts 22, These anchor rods are mounted upon pivots 31, 32, and are each provided with a square heel 33 and engaged by a spring 34. AThe anchor rodsv 29, 30 can be swung upon their respective pivots somewhat after the manner that the blade of a jack-knife may be swung upon the handle thereof. Thus, the two anchor rods 29, 30'

' in Fig. v4. If theV driving bit 28 is out of engagement-with'the anchor rods 29, 30, the spring 36 causes the, driving bit to swing up into a'horizo'ntal position, as indicated in Fig. 4. If, however, the anchor rods 29, 30 areinserted inthe Vholes 85 of the driving bit, as indicated in Fig. 1,'the driving bit is held'with its edge portion downward and is inappearance somewhat like a screwdriver. With the parts in this condition vthe anchor rods 29, 30 are virtually housed and rendered idle for all purposes, except that of holding the driving bit 28 rigidly in osition.

ost of the valves of the type here contemplated are of [two kinds, the one being provided with holes into which the anchor rods 29, f5() may be thrust, and the other being provided with a slot'into which the driving bit 28 may be fitted. My device is adapted for use with either of the two kinds of valve,the only difference being the manner in which the connection is made between my device and the valve. Y The operation of my device is as follows: The parts beingassembled land arranged as shown in Fig. 1, the mechanism is ready for use. In yorderl to connect it with a v-alve ha'vingra slot into which the driving bit 28 may be fitted, the valve is simplyvbrought against the under sideof the device shown in Fig. l so that the driving bit 28 is insertedV within the slot. This being done, pressure is applied to the valve so as to expel a portion of the air and render the rubber cup air tight. The valve, of course, clings tightly tothe rubber cup. If in doing this v`,the pressureV againstpthe driving bit 28 is sufiicient to overcome the pressure of the spring 13, this spring simply'yields and the plunger 14 moves slightly upward. Thus, the'- mechanism is readily accommodated to the valve.

Suppose now,.that we wish to grind a valve not having the slot above mentioned into which the driving bit 28Vis adapted to jit, but having instead a pair of round holes in which the anchor rods 29, 30 are to be thrust. Theoperator turns the milled-head 24, if need be, so as tok free the anchor rods 29, 30l from the driving bit 28. This done, the leaf spring 36, swings the driving bit 28 into the position indicated in Fig. 4. The

operator with his finger next grasps each of the anchor rods 29, 30, and swings it downwardly in much the same manner as he would grasp the blade of a jack-knife and pull it open. This done, the anchor rods 29, 3() extend straight downward and have considerable rigidity because of the pressure of the springs 34. The operator turns the milled head 24 still farther, if need be, until he gets the nuts 22, 23 `inst the right distance apart for the anchor rods 29, 3U to fit into the holes in the valve. This done, and the valve being pushed up tight against the rubber cup, is held in position substantially as above described.

Suppose now, that with the anchor rods 29, 30 extending straight downnuirdly, as indicated by dotted lines in Fig. l, the valve is put on but in such a manner that the anchor rods 29, 30 do not extend into the holes in the valve. As soon as the grinding mechanism is in motion the rotation of the rubber lcup and parts carried thereby soon causes the anchor rods 29, 30 to turn angularly to the extent necessary to enable thein to enter the holes in the valve. ln other Words, if at any time the. cup happens to be set on the head of the valve with the ain-hor rods 29, 30 crosswise of the holes in the valve, the cup will cling on the head of the valve and the anchor rods 29, 3() will find the holes into which they will lit. This done, the vacuum cup will be unable to slip any farther.

It will be noted that spring 12 renders the parts in great measure self-adjustable. Also, that the fitting of the cap 6c upon the upper portion of the rubber member 8 goes far toward insuring an air-tight fit. It will. be noted that the flange 7 being pulled against the shoulder 8 also tends to render the dcvice still further air-tight. If a little oil is put on the valve or in the cup it greatly increases the lifting or pulling power of the cup, for the purpose of holding the valve.

The driving bit 28 and the anchor rods 29, 30 may, if desired, be used independently of the rubber cup 8. vFor such valves as are easily ground and are not likely to cause trouble, this does very well. Thus used, the device can be employed with almost any sort of valve. In other words, it is not necessary in all instances to employ the rubbercup 8, though in general, it is advisable to do so. anchor.

It will be noted that the nuts 22, 23 in traveling longitudinally of the screws 24, 25 are guided by the bolts -21, and these bolts slide freely within the slots 20 into which they fit neatly. yThus, the nuts 22, 23 and consequently the anchor rods 29, 30, are held with considerable firmness at all times, and are not easily misplaced while the valve I also use the driving bit and is in position.

ine/iger l do not limit myself to the precise mechaism shown, as variations may be made therefrom without departing from the spirit of my invention as defined in my claims.

Having thus. described my invention, what I claim as new and desire to secure by Letters Patent is as follows:

l. In a valve grinder, the combination of a vacuum cup provided with a cylindrical passage and a. shoulder partly bound in said passage, a sleeve extending through said passage 'and provided with a flange engaging said shoulder, and means for clamping a portion of said vacuum cup against said flange, and mechanism located within said vacuum cup for engaging the valve to be ground.

2. A device of the character described, comprising a vacuum cup, a sleeve carrying said vacuum cup and provided. with :a compartment, a spring located within said compartment, a plunger extending from. said compartment through said sleeve and into said vacuum cup, a spring located within said sleeve and pressing upon said plunger, and mechanism carried by said plunger for engaging the valve to be ground.

3. A device of the character described, comprising a vacuum cup, a plunger located within said vacuum cup and located relatively thereto, spring mechanism for pressing said plunger in a particular direction relative to said vacuum cup, and mecha.- nism mounted upon said plunger for engaging the valve to be ground.

4t. A device of the character described, comprising a vacuum cup, a sleeve extending thereinto, a plunger splined within said sleeve and extending into said vacuum cup,

spring mechanism for tensioning said plunger, and mechanism mounted upon said plunger and coacting with said vacuum cup for engaging and holding the valve to be ground.

A device of the character described, comprising a vacuum cup, mechanism niounted within said vacuum cup and coacting therewith ii'or engaging the valve to be ground and spring mechanism connected with said last mentioned mechanism and with said cup for allowing last mentioned mechanism to yield readily to said cup.

G. A device ol the character described,

comprising a revoluble member, a cross bar carried thereby and revoluble therewith, a driving bit supported by said cross bar and adapted to lit into a slot with which the valve to be ground is provided, a pair of anchor rods supported by said cross bar, and means l'or connecting said anchor rods with said dii'iving bit for the purpose of holding said driving bit in a normal working position. l n

7. A device of the character described, comprising a vacuum cup, a supported member mounted therein, a. driving bit carried by said supported member, a plurality of anchor rods carried by said supported member, and means controllable at the will of the operator for lining said driving bit in a predetermined operative position while rendering said anchor rods idle, and tor fixing said anchor rods in predetermined operative positions while rendering said driving bit idle.

CHARLES D. ROSECRANS. Vitnesses G. E. Siurrmns, Gno. ALBERT. 

